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PLC Inovance “Modbus RTU” Danfoss FC302 Tutorial

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The VLT® Automation Drive FC 302 inverter of Danfoss Company is a long-standing company in the field of refrigeration technology innovation and innovation. The Danfoss company has developed many ideas for compressors, condensers, evaporators, fans and pumps…

Danfoss FC302 inverter has strong communication ability with other devices by supporting communication protocols: Profibus, Profinet, CAN bus, Modbus, Ethernet/IP… Today will guide you You use PLC Inovance to control it through Modbus RTU.

PLC Inovance & Danfoss FC302 “Wiring Diagram”

Below is the RS485 communication connection diagram between PLC Inovance H3U-3232MT and Danfoss FC302 inverter

Danfoss FC302 “Modbus RTU” Parameters Setting

We need to install the following communication parameters so that the Danfoss FC302 inverter can be controlled and monitored by Modbus RTU.

Danfoss FC302 “Modbus RTU” Registers Address

+ VFD Control Address = C34F (hex)

  • Set Word C34F = H47C (hex) >>> Run Forward
    = H847C (hex) >>> Run Reverse
  • Set Word C34F = H43C (hex) >>> Stop
  • Set Word C34F = H4BC (hex) >>> VFD Reset

+ VFD Speed Write Address = C359 (hex)
(Speed Reference: “0 to 100%” = “0 to 16384”)

  • Output Voltage Address = 16119 (dec) = 3EF7 (hex)
  • Output Frequency Address = 16129 (dec) = 3F01 (hex)
  • Output Current Address = 16139 (dec) = 3F0B (hex)
  • Output Speed Address = 16169 (dec) = 3F29 (hex)

PLC Programming Example

+ Modbus Configuration

+ Modbus Address Setting & Programming

Project Video Tutorial



>>> Download Inovance PLC Programming Software
>>> Danfoss FC302 Inverter Manual PDF Download

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